| Cambs Mediverse 27TH Ltd. | Education | 2024 |
| Cambs Property Development Ltd | Real estate | 2020 |
| Camden Retro Dream Ltd | Wholesale & retail | 2019 |
| Camdyn Automation Ltd | Manufacturing | 2014 |
| Cameo S2S Ltd | Professional & scientific | 2018 |
| Camhouse Developments Limited | Construction | 2012 |
| Camkox Land Limited | Real estate | 2024 |
| Campa Portfolio Limited | Real estate | 2025 |
| Campbell Farming Company Ltd | Agriculture & fishing | 2019 |
| Campbell Fyfe Consultants Ltd | Real estate | 2023 |
| Campbell Fyfe Properties Ltd | Real estate | 2026 |
| Campbell Orthodontics Limited | Health & social care | 2008 |
| Campbells AV Ltd | Professional & scientific | 2024 |
| Campo Digital Ltd | Information & communication | 2018 |
| Campos Declutter Solutions Ltd | Other services | 2025 |
| Camprent Ltd | Transport & logistics | 2019 |
| Camrider - Peterborough Limited | Education | 2003 |
| Camson (EA) Ltd | Real estate | 2025 |
| Camson Properties Ltd | Real estate | 2025 |
| CAN DO Communities C.I.C | Education | 2008 |
| Canaan Country Limited | Agriculture & fishing | 2015 |
| Canal Studio Ltd | Arts & recreation | 2017 |
| Cando Enterprises Limited | Construction | 2010 |
| Candy Corner Shop Ltd | Wholesale & retail | 2024 |
| Canham Controls (PCA) Limited | Manufacturing | 1995 |
| Canham Controls Limited | Construction | 1990 |
| Canham Painting Limited | Construction | 2023 |
| Cannon and Co Sales and Lettings Ltd | Real estate | 2025 |
| Canopy UK Direct Limited | Manufacturing | 2015 |
| Canopy UK Services Ltd | Wholesale & retail | 2025 |
| Canrig Drilling Technology Limited | Construction | 2025 |
| Cant Estates Limited | Construction | 2006 |
| Canter Holland Accountancy Services Ltd | Professional & scientific | 2025 |
| Canter Holland Ltd | Financial services | 2001 |
| Canter Holland Mortgages Limited | Financial services | 2017 |
| Canter Holland Services Ltd | Real estate | 2004 |
| Canvascompany Ltd | Construction | 2020 |
| Capfaptransport Ltd | Transport & logistics | 2024 |
| Capino Finance Limited | Financial services | 2018 |
| Capino Investment Limited | Professional & scientific | 2000 |
| Capino Limited | Financial services | 2018 |
| Capital Build & Clean Ltd | Construction | 2025 |
| Capital Credit Hire Ltd | Administrative & support | 2024 |
| Capital Entertainment Limited | Information & communication | 2018 |
| Capital Lawyers Ltd | Professional & scientific | 2015 |
| Capital One E E Ltd | Wholesale & retail | 2018 |
| Capitol Lettors Limited | Real estate | 2007 |
| Capix Limited | Wholesale & retail | 1997 |
| Cappland Limited | Transport & logistics | 2025 |
| Capstone Vale Ltd | Real estate | 2025 |
| Captains Plaice Ltd | Hospitality | 2024 |
| Captios Limited | Financial services | 2015 |
| Capytal Limited | Real estate | 2012 |
| Car Audioz Limited | Wholesale & retail | 2022 |
| Car Diag LAB Ltd | Wholesale & retail | 2021 |
| Car FIX Ltd | Wholesale & retail | 2023 |
| Car Hive Ltd | Wholesale & retail | 2024 |
| Car Market Group Ltd | Wholesale & retail | 2025 |
| Car Mart (UK) Limited | Wholesale & retail | 2014 |
| Car Nation Group Ltd | Wholesale & retail | 2022 |
| Car Planet Peterborough Ltd | Wholesale & retail | 2024 |
| Car Supermarket Peterborough Ltd | Wholesale & retail | 2018 |
| Car World (Cambs) Ltd | Wholesale & retail | 2005 |
| Car Xchange Limited | Wholesale & retail | 2025 |
| Car-Guide Ltd | Transport & logistics | 2016 |
| Carabas Executive Advisory Ltd | Information & communication | 2024 |
| Carantan Limited | Wholesale & retail | 2003 |
| Carapcea Transport Ltd | Transport & logistics | 2024 |
| Carbon Fusion Ltd | Other services | 1985 |
| Carbon Property Developments Limited | Administrative & support | 2024 |
| Carbon Property Management Limited | Households | 2026 |
| Carc Construction Services Limited | Construction | 2025 |
| Cardea Barbers Limited | Other services | 2020 |
| Cardiff Place Residents Company Limited | Households | 2000 |
| Care Agency Ltd | Administrative & support | 2022 |
| Care Concierge Limited | Health & social care | 2019 |
| Care Home & Alzheimer's Care Complex Ltd | Construction | 2025 |
| Care Homes T.R.W. (Holdings) Ltd | Financial services | 2025 |
| Care NOW East Ltd | Health & social care | 2025 |
| Care Organisation Ltd | Public administration | 2019 |
| Care Personnel Services Ltd | Health & social care | 2022 |
| Care Reserve Ltd | Health & social care | 2021 |
| Care Reserve Salon Ltd | Other services | 2021 |
| Care Way House Ltd | Health & social care | 2025 |
| Carebridge Community Support CIC | Education | 2026 |
| Carebridge Medicals Ltd | Health & social care | 2026 |
| Career Uplift Ltd | Education | 2024 |
| Careled Ltd | Administrative & support | 2025 |
| Caremath Limited | Health & social care | 2019 |
| Careride Solutions Ltd | Transport & logistics | 2025 |
| Carey Lead Limited | Construction | 2017 |
| Carey Leisure Limited | Administrative & support | 2016 |
| Carin Services Ltd | Administrative & support | 2019 |
| Caring Harmony C.I.C. | Health & social care | 2025 |
| Cariso Care Consult Limited | Health & social care | 2021 |
| Carju Michlie Limited | Construction | 2007 |
| Carl F Groupco Limited | Wholesale & retail | 1988 |
| Carl F Petersen Ltd | Professional & scientific | 1988 |
| Carlink Vehicle Transport Ltd | Transport & logistics | 2023 |
| Carlos Pizza (Peterborough) Limited | Hospitality | 2015 |